Mining apparatus



Se t. 6 1927.

p M. P. HOLMES MINING APPARATUS Original Filed March 3, 1919 Sept. 6, 1927.

M. P. HOLMES lMINING APPARATUS Original Filed March 5. 1919 4 Sheets-Sheet 2 21% I .wl lllimw m \\Jw uw M o. o O 0L 1! v1.4 I i .QN 1% N? t' Sep 6 1927 M. P. HOLMES MINING APPARATUS Original Filed March 3, 1919 4 .Sheets-Sheet, 3

Inveiz UZ0 t' Se t. 19

p 6 27 M. P. HOLMES MINING APPARATUS Patented Sept. 6, 1927.

PATENT orifice.

vMoi-mis' HoLyzlEsfpcaAitmoNm. Hammam-BE.' AssrGNoa "ro SULLIVAN i MACHINERY-confzmwa CORPORATION oi?Y MASSACHUSETTS.

HIKING APPARATUS.

. .Application mdd? Marek" .3, 1913,

`My invention relates` tomining .apparatus-1. It hasl foi" zits object. to proyidean improved supporting.. means.: er'. gminmgj'maieh-ine mechanism qwherebv. thgelatten is. en

afbledto he operated: undera -Wider;ran e o f..

service .conditions and. Withincrease fa.-.

eiLityv A iurfther --ebjeet et my-.inve'ntion .is to prox/'ideeen impnoved supporting any transporting .means .ioir such egnfieclianism, preferably: of the: swive'lfft-ilting. iront type; which-is builtclose to the bottom. and .adapted to-enerbllfeithe saane'tebe'usedfin `low vein work. A1 still further-lobject ogfgmy inverttion '150s'provide. .an improwd supporting means' having;- .imjpxgoifei Aepreeagaibly auto matiealgly controlled; supporting mechanism adapted- .tofrest f fupen.-A the "bottom and suaportthe cutting meehanismf'over the. mine bottom` :as when?r operating in ai :rooml .or an entry.A VVA.stillruith/er objectffmy inventionis'A to provide lil-liproved supportf ing means-of theeharalcter fortliiwhich is operative' tosupport the cutting' mechaf nfism on Tan. uneven bottom,..the effective height of-vvthe supporting-means preferably being automatically variable im accordance with the variations in the level of the mine bottom. Additional objectsef myvin-vent-ion i-nclfutlethei provieionot'atn improved truck,

constructed and equippedtoiifalcilitate and Spee-ci: the unloading mid loading operations of a room and filler machine and the corresponding preliminary a'ncl finaly opera; tions of machinesof the type-.,Wliicli cut AWhile on the truck, at-the same time that an ixnprovei'simplitietl, and rugged construction adapted tofunction. efficiently under `the varying. stresses and abuses-of. service is produced. These and other objects and advantages of my improved construction will, howeveryhereinefter more' fully .ap'

ear.

En the accompanying draw-ings I have shown lor' purposes of illustration three em;- bofliim-:nts which my invention may assume in practice. Y Y

InA these drawings,-

F ig. l is a pian view of one embodiment of my improvement. the machine being removed to facilitate'illustration and the til-ting member tilted'.

Fig:4 2 is aside elevation cithe same, the parte being shown in--full lines-in transpmserial Na...2so,ae4. 1-renewed october 2s. 1926.

positioipand in dotted linesl in unloaded post-ion, the machine being. removed in= the latter position.

,Fig 3 is.anffenlargeddetail viexv,v

partially. in section, showing my improved supporting mechanism.

1g? on linefl-.f-btFig'.. 3'-, illustrating the same mechanismand also its voperating means, the parte being shownin twoposi'tio'ns. :5.is. a transverse. vsectior'ii1-l view tale substantially 4Online 5.-. 5f. of .Fig. 2. I

fan-,enlargeddeta-il vieni. of a. .of the lswivel,support, 7 .-is a'fdiafgrammat'i'c vieuff showing this embodinient of my invent-ion in its usual positionsili room onroemfneek iv'ork.

i* 1g. 8 isua side'elevation of a modified form of my invention. ;Fig. is :a side elevation of afurther modified vform-offmy invention wherein the same i's embodied inffaf`mounted cutter machine,v i

fFig. lQisa. plan view of the machinesupportlng:means shovv'nin -F ig.- 9, the machine beingremoved.g n I Figs. 11 and 12 are diagrammatic views illustrating certain ofthe different positions whiclra imach'ine of this form may occupy during cutting.

In this..illustrative construction, it will 4 41s a.vert1cal sectional View taken.V

be observed that I have shown m5' imprcvefeed chain 2 and a rotating driving member 3 therefomand also havinga projecting cut-4 ter chain-carrying, bar 4. This machine 1 is supported upon. a truck frame 5 which is in turn supported en axles 6 and truck wheels 7 movable over the mine track and operatively` connected through a suitable driving .connection`l as a chain and sprocket connection 8. Asshown, this connection, 8 isitSel'E Mapted t0 be dri-ven by a similar chain and sprocket connection 9 connected toa transverseshaft 10-t herein a part of a usualtruck driving. mechanism l1 carried on thel rear en d` of the truck, and' adapted to be.: driven in any desired manner'v from the imnihgmaliine. hereinV through ig'' included' i @the truck dii vi nemeijti and adapted to mesh with a gear 13 on the mining machine when the latter is in transport position. As usual in thistyp'eofmachin'e, an upright chain fork 14 is also provided at the rear 'end of the truck frame 5 in order togcooperate .with the chain 2 during the operation of Vmoving the machine ,upon its truck.

In the form of my improved construction shown in Figs. 1 to 6, it will be observed that the truck framei vis elongated, extend# ing a substantial distance beyond the front truck Wheels 8.' ltvvill also be observed thatthe height Yof the same'is substantially that ofthe axleskthe frame beings supported thereon by suitableaxleboxes' 15 that it is disposed but slightly ,abovethe'top of the axles with its bottom well below thetop of the wheels. shown,I this frame includes a plurality'lof laterally spaced, longitudina ly disposed, flat'bottom plates 16 and angle or flangedside members 17, 18, of which the members 17 aredisposed in ,rear of ,the front vvhtxgls 7 .and are provided with upstanding flanges', while the members 1 8v are disposed in frontof the front Wheels beneath horizontal".extensionsl 19 on the members l'jandare provided with depending flanges;.'It will alsonbe observed that these elements are rigidly connected transversely atl their rearends by the truck driving mechanismll' andthe axles and axle boxes, and aire:,'siinilz'irly'fl rigidly connected at opposite ends by a plurality of transverse f plates 20 in suchY a Vmanner as to produce an exceedingly rigid ,structure forming at its rear end a longitudinally disposed guide for a miningdmachineand having throughout its lengthfa longitudinallydisposed central slot 21 formed between the members 16.

Cooperating with this slot 21 and slidable therein is a reciprocable member 22 (Figs. 5 and 6) having straight sides 23 engageable with the walls of the slot 21, and rounded ends 24, the construction being such that the member 22 may rotate only when opposite slightly larger, curved cut out portions 25 at the front end of the slot 21. This member 22 has fixed to its upper surface a turntable element, herein an enlarged, substantially oblong .upperl plate 26 of substantially the width of the vframe bottom and resting on and slidable overthe latter, and also has fixed to its bottom a lower, round plate 27 of but slightly greater diameter 'l upper surface at its opposite sides, a pair of fiat, longitudinally extending machine supporting plates 28 disposed in but a slightly higher lane than the plate 26, the construction eing such that a machine may be supported on the member 26, herein with the latter to have its rear end clear the upstanding flanges on the members 1T, i. e., when the member 22 is brought opposite the cut away portions 25. In this connection, it will be noted that the machine when so rotated is locked against longitudinal movement untilthe flat sides 23 of the plate 22 are again brought into registry with the slot 21.

operatively connected to the turntable element, is also, improved means for loading and vunloading a machine relative to the truck.""As shown herein, the transversely spaced plates 28 are provided with downwardly disposed extensions or ears 29 on their front' ends, herein disposed in vertical planes,` which vare pivotally connected, as by transversetipivot pins 30, with the rear ends of depending longitudinally extending flanges 31 formed von alongitudinally disposedmachine receiving frame 32. This frame 32 is preferably open at both ends and adapted during loadingv to receivethe machineand thereby be disposed horizontally on the frame 5 beneath the machine, and during unloading to discharge the machine and be tilted thereby about the pivotpins until its front end touches the bottom. As shown, this tilting frame 32 includes a plurality of laterally spaced frame members 33 having flat bottom portions and upstanding flanges or'sides adapted to guide the mining machine in its movement, the members 33 being suitably laterally braced Where necessary, as by transverse bracing members 34, herein at its opposite ends. ln connection with this frame 32, it will also be observed that, for use in loading the machine thereon and angling the frame and machine as hereinafter described, opstanding members 35 are provided on opposite Sides of the longitudinal center line of the tilting frame 32, preferably at the r r ends of the flanges 33. adapted to be engaged bv the feed member. chain slots 36 therefor`r being provided herein. It will also be noted that in order that this member 32 and the machine thereon may be moved longitudinally by the machine, the frame 5 is provided With laterally ext-ending feed member engaging hooks 37 atits front end. herein two disposed on opposite sides of the same.

Cooperating with the above described mechanism, and acting to support the machine when the latter is disposed on the ex tended front end of the truck. as for instance beyond the end of the track in a room protruding front endet the frame 5.' 'As' shown',tliese'members 38 are each provided with a 'rounded and 'widened fr'qntend' 4 0 adapted firmly toengage the mine bottom at any angle of .the members 3S thereto, and' with a .longitudinally:"disposed'chamber 41- in that 'en d, opening toiva'rd 'tlie" cen'tr',and having a series `(if. 4- v4Sta-riding ratchet'teeth 42 disposed longitu' inallyzilo '6"'tlre bot# tom thereof. y Cooperatihgwith' yese."teeth is .a Peil* 0f d0' `.S".13 ,each hevls 'ii- 0Miments 38 and 51 .and .underlie a l 38 and 4T is an. operatingmember therefor.

This member. isherein .illustrated .at/ .5.1 as a longitudinally extendinglilembor di'spQSd between the Aopposite *pairs* of ,membersi38 and 47 and pivot-ally supported at its ,rear end on the front axle 6 in suitable bearings :32 located between .the bearin .39. .As shown, the front end of this .mem er 5.1 carries a member 53 .underlying and adapted to litt a sleeve 54 ivhich houses and serves to connect the inner ends of the two-part stud 45, Also it will be observed. that the members 38 carry a transverse rod 55 between their enfle. which in turn carries a s acing sleeve 56 and is adapted `to connect-t e ele- Y 57 on the member 51 and thereby hold the latter in folded position as hereinafter described. Thus it will be noted that hy swinging the member 51 upward to. raise the sleeve 54; and release the members 38 and. 117, those members may be folded into substantially the same plano in inoperative position (dotted lines. Fig. 4) beneath tbe truck frame, the members being held in that position by the rod 55. Also. conversely, .by then releasing the member 51, the parts may. be drop ed into supporting or operative sition ul-l lines. Fig. 4) and automatically locked therein-by the mutual action of the teeth 42,44.

As shown. this member'51 is automatically operated as the machine moves relative to theitrnck 5'. More particularly, it Will-be noted that on its rear end and in rear of its pivot, this member 51 carries a transversely disposed roller 58 journaled in 'suitable bearings formed in rearwardly disextensions' 59 on the operating memer 51. As shown, this roller 58 is engagea'ble by a bottom cam plate 60 fixed beneath and movable with the plate 24 and having' a. gradually inclined cam surface 61 formed onits rear end and the rear end of thev member 24, and a more abrupt cam' su'r-v face 61 on its front end. The surface `61T adapted, when the member 22 is moved rearward on the truck. to engage the roller and force it down in such a manner as -to raise' the members 51` 38, and t7 to the folded, ino 'erative position shown in dotted Vlines 1n. Fig. 4, so that the parts may beheld in that position by the engagement ofthe roller. with the under side of the plate @Gand locked in position by means hereinafter described before the surface 61' has passed over the roller. It will be noted that.` conversely, thev surface 61 acts initially to depress the roller 58 when the member 22 is moved forward on the truck, and vthatthesurface (il then acts as aA release surface. "'f

th'ejlatter as the member 2'2 moves 'forward then permitting the roller to' swing up to the full li-llposition shown in Fig.V 4 and thereby permitting the supporting'means to drop into their operative or supporting position in which the parts are locked by gravity. Here, it will also be observed that the movement of the member 22 is so timed .with respect to the roller 58 that. the supporting means are lowered shortly after the member 22 Starts outward, i. e.. as the machine begins to unload, and that these means are raised when the member 22 has ahi-.ost completed its inn-'ard movement-l` i. e., when the machine is practically in transport po- 9 sition.

As a result of the provision of the rod on the members 38 and the lug 5T on the member 5l, it will also be noted that a. supplementary means is provided to cooperate with the cam surface 60 in holding the members 38, 51 and 47 in their elevated position. Attention is also directed to the fact that vthrough the provision of laterally disposed members 62 on the flanges 3l of the tilting member 32, and cooperating:r laterally disposed lugs 63 on the members 38, further means are provided to revent the vibrations arising from rougli track. crossings, etc. from causing chatteringr of the supporting means when the same are in transport osition, the members 62 automatically slidlng under the lugs 63 as the machine moves toward transport position and before the cam surface 61 has passed the roller 58, in 1 such a. manner as'to hold up the members 38, and automatically sliding out from under the same as the machine moves to unloading position, in such a manner as to release the members 38 so that they may drop when the rolleris released-by the surface 61:,

In considering the operation of this embodiment of my invention,v and. referring more particularly to Ffigwf, which illus-v f-, trates diagrammatieally thel usual' operative positions thereof, it.- will be observed that with my improved construction it is possible tounload a room and filler machine fromits truck at any-desired angle, In considering the operation of thesmechanism, let ns reup or inoperative positionshown in full lines in that figure and in do'tted lines in Fig. 4. The truck fis,.asusua l, brought into the room under its olwnpower andstopped with the front truck'wheels .75 thereof vpreferably closely adjacent the-frontendiofutlhe track and the front end ofthe frame' extending a substantial distance beyond ,the end of the track in such a manner 'as to bring the machine as close aS Possible-tothe face "1? before it is unloadeLf,r VVhen'the truck has reached .the position indicated, the feed chain 2 of the vmachine, is connected between the feed driving sprocketA 3 thereof land .a point at the frontend ofthe truck in a well known manner, as for instance to one or the otherof the laterallyextending hooks 37. As a result of this connection, when the chain driving sprocket, 3 is rotated by the machine, the latter, with its underlying frame 32 and theslidingvs'wivel carrying member 22, will be. fed forward alongl the chain 2 and relative to the guide plates 16. As the member 22 tirst moves forward, it will be observed that the cam plate 60 thereof will pass freely over, and yet con tinue to depress, the roller 58 on the, then elevated member 5l, and thus serve to maintain the members 5l, 38 and 47 in their folded or inoperative position until the member 22 has moved sutiieiently forward to pass the cam surface 6l over the roller 58. lVhen this occurs, as it 'does almost immediately and long before the center of gravity of the machine passes over the front axle, the members 62 on the frame. 32 have already released the lugs 63 on the members 38 so that these members and their connected members 5l and 47, due to their weight, are free to drop about their pivots into supporting position, wherein the front ends of the members 38 and 5l engaging the bottom and the members 38 and 47, are locked by the engagement of the dog teeth 44 with the teeth 42 on the members 38. Gbviously, after the machine'has thus been provided with stable supporting means, the member 22 is free to continue its forward movement until it reachesthe openings 25 in the lframe 5, where its further forward movement is arrested by its engagementwith the upper transverse tie plate 20. In this position of the parts, it will be observed that the machine is disposed substantially above the supporting members 38, 47 and 51. Obviously, if it is then desired to deliver the-machine as usual into sumping position at theright rib, this may be readily accomplished, after releasing the usual friction,vby.si.mply passing the chain around a usual swing arm 64 on the front end of the machine f and changing the connection of the free .endv of the chain 2 from its hook 37 toa suitable support disposed adjacent the face, herein a usual take-up mechanism 65 preferably initially placed as shown in its position for the cut across the faoe. IlVhen this :has been -done,'by simply again applying the friction the machinemay be. swung automatically'with its swiveled frame 32, the latter being locked as ,it moves in such a manner -asto cause the front end ofthe latterto aline, itself with the take-up and then move, forward along the chain and in the frame 32 in such a manner as to tilt the latter downward and bring its front end into engagement with the mine bottom while its rearend is supported on the truck, thereby affording an inclined support over which thevmachine then slides from the truck onto thebottom inits continued movement toward the take-up. Obviously, the machine may thereafterbe sumped in the usual manner.jj If, moreover, instead of so delivering the machine `in a room it is desired` to deliver the same at the rib or a point nearer the line of the track,vas in an entry, it will be observed that this may be readily accomplished by simply conmectinpr the. front end of the chain to a support, in the form of either a jack or a take-np, located at, the desired point and then starting the feed. whereupon the machine will be fed olf of the truck, if necessary, automatically swinging on its swivel into alinement, and, when it reaches that position, being unloaded from the truck as described above.

It will also be observed that, if desired, the machine may be unloaded at right angles to the track and thereby' be utilized in cut-ting room vnecks or the like. the chain, after the machine has been moved outward, being simply connected to the desired point and the feed then started, whereupon the machine is swung about its swivel to the desired position and then automatic-ally fed off of the i truck. After the machine has thus been unloaded from the truck, itwill be observed that whatever the angular position of the tilting frame 32 relative to the track, the frame will continue to occupy the tilting position relative to the truck shown in Fig. 2, i. e., a position in which is lready to receive the machine when it is ldesired to load thesamc. Before this is desired, landpreterably while the room orentry is being cut.y the frwme -@his swung into the easiest loading angle with respect to the machine. This, due Eto, .the balanced structure, is accomplished byV simplyn'aifsing its front end and, after pushing lit around toKt-hedesired position, Adroppingthe.,same.v l/Vith the frame thus position, `usually pointing toward the left rib,- by simply extending the chain 2 .back up the tilting member and around the nearest chain fork 36 formed on the rear end thereof, to the cl1ai11 fork 14 on the rear end of thetruck, it wllbe observed that the machine may be returned to its transport position with great facility, the same under certain conditions being automatically r'awn up the tilting trame 32 and with the latter movedv into'horizontal Aposition on the frame 5,- andlthen .swunginto registration with .the latter and Areciproc'ated therein into transport position ,without 4any, other attention, the supporting meaxrsbeing automatically raised as thewmachine approaches ,transport position in the truckv' It may, liowever,'be desirabe-1 is' inA a .usual practice, tojacih-tate thelmovement of the machine onto the' front end vof the.)tilt-ing'member by insertingva' jack on, the thus connected chain at a point between the frontr transverse members of the tilting member and removing this jack when the machine first rides u over the front edge of the tilting frame. ere it will, however, be observed' that in whatever way the machine is guided-.onto the tilting frame, the chain,` ust as soon as' the mach-ine and frame reach horizontal position on the truck, acts to swing the same laterally into registry' with the rear guide portion of the frame 5, and thereafter slide the parts to transport posi'- tion therei'n. the chain heilig automatically disengaged from the chain fork 36 on the rear end of the tilting frame during the swinging action, vi. e., when that chain fork is swung past a line extending from the sprocket 3 'through the chain fork 14 on the frame 5. A I

In' Fig. 8 I have illustrated a modified form of. my invention, which, while not as satisfactory for certain purposes as the form of the same described above` is adapted to use underAcertain conditions. In this construction it will observed that a@ member (56, herein lextending from one side of the mach-ine and movable with the latter, engages wi-tl-i'- an upstanding cam-member 67 of suitable form pivota-lly mounted at G8 beneath ,the frame 5 in such a manner as to turn the cani member about its pivot and thereby operate' a pi-voted rod 69. As shown, the downward li-mitof movement of'this rod is established by a stop 70, and the front end of the rod is pivotally connecte-d at 71 to the upper end of a support 72 pivoted at 73 b eneath the front end of the frame 5. In the form illustrated herein, the cam member (3.7 is provided with a plurality of cam surfaces 1'4 and 75, of which the surface l74: is adapted to be disposed above thelevel of lt;lie'-f1a'n1e 5 when the support 7,2` is' in its full line or operative position, while the member 75' is ,adapted to be so disposed when thesupport 72 is ii its `dotted line oi" inoperative position. Thus it will be observed that by p'roviding a suitable trough 76 between these members 74 and 7.5, it is possible to actu'r'rte this cam member to ,raise vand lower the suplgort 72 as th machine is loaded or unloaded.

bviously', in the use of this lform of my invention, a like seran "ement of parts may be provided, if, desired? on each side of the truck. Preferably, in this' form lof myA ventionthe support 72 is also adapted to use 4on the usual varying' mine bottom',xby providing the sainewith a vrtieallyadjiistabe portion or foot'v 77 adapted to' be' held indifferentlpossitionsrelative thereto by suitable oltsfS receivable in holes 79 i'n the support 72'. y K

In Figs. 9, 10, 11, and 12 I' have illustrat-ed a further modified forni of my invennon wherein the same is' adapted to use in connection with that type of l'nachine where'- in the mining machine', cuts a lerf wli'ile mount-ed, usually,thlough'not necessarily, in accordance ,with the so-called arc'wall system. In thisV form of my invention'. it will be observed that, as in usual constriiction, the mining machine 1 is vseated in and'removably attached to` a horizontally disposed, short, open-ended guide frame which i's in turn rigidly connected to the top of an upper, horizontally disposed turntable member 81 rotatable about a swivel 82 on a lower corresponding plate 83 and adapted to be held amv desired position with respect thereto by a. pin 84 adapted to be received in a iluralit),v ot' registering apertures 85 in the plates 8l and Herein, it will also be observed that the plate 83 is reciprocable in suitable guides 86 formed on the Yframe 5, the same being' provided with a depending sli-ding block 87 el'iga'gea'ble with and slidable relative to the guides, all as in a well known 1na-nner, to orv from coop? erative relationship with the truck driving mechanism, i. e., transport position, in which the frame SO is adapted to be locked by the usual locking mechanism 80', the cooperating truck driving mechanism being essentially the same as heretofore'. 1n consi-dering the adaptationof my iin-proved construction to a machine of. this type, it will be understood that the members 38, 4T and their connecting' mechanism are substantial! lv similar to the same members described above in connection with the form of my in'- vention shown in Figs. 1 to 6. Herein, however, it will be observed that the member 51, while otherwise 'also similar, is provided with a plurality' of upwardlyland rearwardly inclined cam members 88 disposed in rear of the front axle 6 and adapted to be engaged by the sliding block 87 and operated thereby. More specifically, it will be observed that with thel parts in their operative or supporting position shown in Fig. 9, the rearward movement of the block 87 ltoward transport position'will depress these cam portions 88 and thereby cause 'the members 38, 51 and 47.to be elevated or folded as hereinabove described; while when the movementof the machine 1 is reversed these cam members 88 will be released as soon as the block 87 clears thevsame, vand thereby permit the members 38, 51, and 47 automatically to resume .their operative position shown. Thus it will be observed that in this form'of' my invention the moving member itself, herein the sliding block 87 on which the machine is su ported during cutting, acts to control the supporting mechanism and hold the latter in inoperative position during transport.

In the use of this form of my invention, it will be noted that upon reaching a place, the locking mechanism 80 is first unlocked and the machine then angled relative to the truck, as shown in'Fig. 11, and locked in that position by the pin 84 in order to enable the same to make its sumping cut in an entry. In this position, the sliding block 87 is still over-the cam members 88 so that the supplemental supporting means extending beyond the end of the track is not lowered. As, however, the machine, as a result of the usual connections of the feed chain shown, is moved outward in its sumping cut, i. e., from the full line toward the dotted line `position shown in Fig. 11, it will be observed that the supporting mechanism is automatically actuated in such a manner as automatically' to provide a stable support for the machine well before the center of gravity passes over the center line of the front axle. Conversely, when the machine, as a result of the usual changed connections of the feed chain shown, has made its transverse cut, i.' e., moved from the dotted line position shown in Fig. 11 to the dotted line position shown in Fig. 12, and, as a result of the then further changed feed chain connections shown, is moved rearward in its withdrawal cut from the dotted line position shown in Fig. 12 to the vfull line position shown therein, it will be noted that the block 87 will then engage the cam members 88 in such a manner as to depress the same and thereby fold the supporting mechanism into its inoperative position after the machine has passed off of the overhanging portion of the frame.

As a result of my improved construction shown in Figs. 1 to 6, wherein the machine is supported almost Adirectly upon the axles, it will .be observed that it is possible for a combined swivel and automatically tilting front type truck such as is used in a short wall practice to be adapted to low vein work, in which, on account of its great height, it has heretofore been impossible for any known truck of this type to operate. More particularly, it will be observed that due to myimproved construction it is possible to reduce the height of the mechanism-by substantially nine inches and thereby produce a mechanism having a. height of about thirtyfour inches which is amply low to enable this type of truck to be used in any of the many so-called low vein mines which constitute about thirty per cent of the total number of mines inv the country, and in which it has heretofore been impossible for a truck of this type to be used. It will also be observed that due to my improved supporting mechanism it is possible to support the mining machine over the bottom and beyond the end of the track when used with either'a room and pillar machine or a machine of the type wherein the machine cuts on its support, with both greatly increased stability and facility'. More particularly, it will be observed that in my improved mechanism a stable supporting' means is provided having substantial and relatively wide contact with the bottom at points spaced on opposite sides of the center line and beneath the outer position of the mining machine on its support. It will also be observed that this mechanism is automatically set as the machine moves out, thereby eliminating the necessity for the operators setting manually and laboriously two or more jacks beneath the front or rear end of the machine before the latter can be moved forward on its support. Attention is also directed to the fact that through the use of my improved mechanism which automatically compensates for variations in the level of the mine bottom and provides a stable support under all conditions, all necessity for manual adjustment of the jacks heretofore used during the setting of the same is avoided. In other words, it will be observed that due to my improved construction it is possible for a machine of either the room and pillar or the mounted cutter type to 'be run into a place in either a room or an entry and be automatically supported and extended beyond the end of the rails and close to the face without the necessity for the operators setting or adjusting any supports whatsoever, and this regardless of the level of the mine bot-tom. Conversely, it will be observed that after either a room or an entry has been cut, it is possible to return the machine to its transport position and start it along the track toward the next mechanism.

4place without the removal of any jacks, thereby further increasing the facility and speed of mining. Due to my improved construction including the swivel, slide, and feed chain connections, itwill also be observed that means are' provided to facilitate the loading of a room and pillar machine. These and other advantages of nay-improved construction will, however, be clearly apparent. to those skilled in the art. y .4

"hile I have in this application specifically described several embodiments whichmy invention may assume in practice,it is to-be understood that these forms are used for purposes of illustration only and that the invention may be further modified and embodied in various other forms .Without vdeparting from its spirit 'or the scope-'of the appended claims.

IVhat- I claim as new anddesire to secure by Letters Patent is: l f

1. In a mining apparatus, an upstanding support, cutting mechanism thereon movable relative-thereto, and supplemental movable supportingmeans-for said support-controlled by movementotsaid mechanism; 1

2. In a mining apparat-us, .an upstanding support, cutting mechanism thereon movable ieetili'nearlyf-1elative thereto,fa.nd supplemental movable' supporting meansfforsaid support controlled byi -movement of said '3. lIn a mining apparatus,' an upstanding support, cutting mechanism thereon movable relative thereto, and supplemental operatively connected movable 'supporting means for said support set in operation- :upon movement of said mechanism;

4. In. a mining apparatus, a non-collapsible support, cutting vmechanism thereon movable relative thereto, and-supplemental operatively connected supporting means for said support. automatically movable to .operative position as said mechanism moves .in one direction.

5. In a mining apparatus, anon-collapsible support, cut-ting mechanism thereon movable relative thereto, and supplemental operatively connected supporting means. for said support automatically movable to inf operative position as said mechanism moves in one direction.

6. In a mining apparatus, a non-collapsible support, cutting mechanism thereon movable reverselvrelative thereto, and supplemental operative-ly connected supporting mean-s for said support automatically .movable to and from operative position as said mechas-usm moves in opposite directions.

a.' mining apparatus, a horizontally disposed frame, cutting mechanism thereon movable longitudinally thereof, supporting means for said frame, and cooperating supporting means for' said trame controlled by movement of said mechanism.

g' 8. Inla mining apparatus, a horizontally disposedV frame, cutting mechanism thereon movable longitudinally thereof, supporting Vmeans for said frame, and cooperative supportingmeans for. said frame automatically movable: int-o operative position as said mechanism moves in one direction.

9. In a mining apparatus, a horizontally disposed frame, cutting mechanismA .thereon movable vlongitudinally thereof, supporti-ng means for said frame, and cooperating supporting means for' `said frame automatically movable-.into inoperative position as said mechanism moves in one direction.

.110.. Inga mining-apparatus, a frame relative to which. a member is adapted to be moved, supporting means for said frame maintaining the same in elevated. position in aZ horizontal plane, supplementary movable supporting means for'said frame. and means automatically controlled by movement of a memberim'ovable vrelative to said. frame controlling one of said support-ing means.

1l. In a mining apparatus, a frame relative lto which. a memberV is adapted to be natured; supporting -means for said frame 'maintainin-gthe samein. elevated position in a horizolntal plane, supplementary movable supporting means fors-aid frame, and means automatically controlled by movement of a member movable relative tosaid frame con- ;tnollzmg `said supplementary supporting means.

f. y1:2. vIn a mining'apparatus, a frame, sup-- porting rmeans for the opposite ends thereof `naaiialtainingsaid' framein a horizontal plane, -a supplemental supporting means, cutting Lmeclmnisnr movable longitudinally of said frame, and means controllable thereby controlling-the positionv of one of said supportv ing. means/x 13. Inra mining apparatus, a frame, supporting-- means for the opposite ends thereof, a supplemental supporting means, cutting mechanism carried 'by and movable longitudinally of said frame, and means operable in timed relation with said mechanism controlling theV positionof one of said supporting means. Y

T4.' .In a mining apparatus, a wheel support-edi frame movable freely over a trackxva-y and having one end disposable over the mine bottoni, cifrtting mechanism carried by and movable relative to said frame` and supplemental movable means controlled by said mechanism for'supportng said end of the frame.

15. In a mining apparatus. a wheel supported horizontal frame having one end disposable beyond .the end of a mine track, cutting mechanism carried b v and movable relative to said frame, and supplemental movable means having its movement controlled by said mechanism for supporting said end of the frame.

lili) frame of a member movable relative to said frame.

18. In a mining apparatus, a Wheel mounted frame movable freely over a trackway, cutting mechanism thereon movable relative thereto, and supplemental cooperatingmeans automatically actuated to support said frame as said mechanism moves relative thereto.

19. In a mining apparatus, a Wheel mounted frame movable freely over al trackway, cutting mechanism thereon- .movable relative thereto, and supplemental cooperating means automatically actuated to support one end of said frame as said mechanism moves relative thereto.

20. In a mining apparatus, a guiding frame, a truck beneath one end thereof movable freely over `a trackway,^ aminin machine carried by and movable longitudinally of said frame, and supplemental supporting mechanism for said frame adjustable as to height and controlled by movement of said machine.

21. In a mining apparatus, a su port having a fixed relation to the horizontal and disposed in a horizontal plane, cutting mechanism thereon movable relative thereto, and automatically cooperating supplemental supporting means for said support of variable effective height.

22. In a mining apparatus, a support having a predetermined relation to the horizontal and disposed in a horizontal plane, cutting mechanism thereon movable relative thereto, and automatically cooperating supplemental supporting means for said support of automatically variable effective height.

23. In a mining apparatus, a wheel mounted frame having front and vrear Wheels, a member thereon movable relative thereto, and supplemental means automatically adjustable as to height actuated to support said frame as said member moves relative thereto.

24. In a mining apparatus, a wheel supported frame having front and rear wheels. cutting mechanism thereon movable relative thereto, and supplemental automatically cooperating supporting means for said frame engageable with the bottom at points on opposite sides of the frame center line and controlled by the position of said cutting mechanism. v

25. In a mining apparatus, a support maintained in av definite relation to the horizontal =and disposed in a horizontal plane, cutting mechanism movable over the same, a member movable therewith, and supplemental movable supporting mechanism for said support controlled by said member.

26. In a mining apparatus, a support maintained in a definite relation to the horizontal and disposed in a horizontal plane, cutting mechanism movable over the same, a member movable therewith. and cam operated ,supplemental supporting mechanism for said support actuated by said member. .27.In a mining apparatus, an upstanding support disposed in a horizontal plane, cutting'mechanism movable thereon, supplemental foldable supporting mechanism for said'support, and automatically actuated mechanism .controlling the position thereof. 28. In a mining apparatus, an upstanding frame disposed in a horizontal plane, a member movable thereon, and supplemental nor- A`mally operative supporting mechanism for said frame releasable by said member.

29. In a mining apparatus. an upstandingr frame disposed in a horizontal plane. a member movable thereon, and foldable supplemental supporting mechanism for said frame glded and unfolded by said movable mem- 30. In a mining apparatus, an upstanding frame disposed in a horizontal plane, :i member movable thereon, and foldable normally operative supplemental supporting mechanism for said fram-e folded and unfolded by said movable member'.

3l. In a mining apparatus, an upstanding` frame. disposedv in a horizontal plane, a mining machine thereon movable relative thereto, a supplemental pivotally mounted supporting member therefor beneath the same controlled by movement of said machine. and automatically operative means for holdingv the same in a plurality of positions.

32. In a mining apparatus. an upstanding frame, a mining machine thereon niovable relative thereto, a supplemental pivotally mounted supporting means therefor beneath the same controlled by the position of said machine, and automatically operative gravity actuated means for holding the same in a plurality of positions.

33. In a mining apparatus, an upstanding frame, pivotally mounted supporting means therefor beneath the front end of the same,

and automatically operative means for hold operatingdogging mechanism rigidly conneetinrr the free end thereof with said frame 1n a plurality of positlons.

35. In a mining apparatus, a supporting fram-e. pivotallv mounted sn'pportin'g'me'ans beneath the front end of the same,l means inline of said frairi'efan'tl xiie'anstae't-i'ng on the'v free. ends thereofifor 38. In a' mining 'apparatusya supporting :4

frame, su porting' meanslineluding members tions and opposite of vsaid frame', and

for elevating the s 39. `In a mining' appa-'ratsTa-supporting frame, 'supporting ,means including members beneath :the saine ino posite' directions and onv opposite sides' oft e Center line of said frame and interlocking'meehanism between said mem-bers,.an d meansj f'or releasing said mechanismandelevat-'ing said members into inoperative position.:

A'.-O. In a mining apparatus, alfrainepa member thereon movable relative "thereto, support-ing means for said frameretaining the same in a predetermihedvrelation to the horizontal and ina horizontal plane, sup- )lemental support-ing means therefor, mechanism for moving the latter irito inoperative position as said member vis moved, and cooperating mea'ns for,.holdih,g'{ the same in that y position.

41. In a. mining apparatus, a guidingf frame, a member thereon vmovable relative thereto, supporting means for said frame retaining the same in apredetermined 4relation to the horizontal 'and in a horizontal plane, su plemental supportinglmeans therefor, mechanism for moving t elatterinto inoperative position as said. member is moved, and cooperating means'i'novable with said member for hold1 x 1g t`he same in that position.

v4:2. In a mining apparatus, la supporting frame havin Ma predetermined relat'iuto the horizonta normally depending pivoted and pvotally connected members disposed zontal supporting vframe having beneath the front end ofthe same, mechanism for maintaining said members in a. plurality of different angular relations, and means for folding said members beneath said frame.

43. In a mining apparatus, a supporting frame having .a predetermined relation to the horizontal, normally-depending pivoted and pivo'rally connected members disposed beneat-hthe same, mecha-nismfor. maintain- 'ing said ymembers-ina plurality ofdifferent 'angular relations, and means controlled by a member movable over said .frame .for folding 'said members'beneath the latter.v

' In ai mining apparatuafa wheeled horiits bottom disposed-substantially adjacent the axis of its wheels, means movable thereon, and supplemental supporting mechanism for said frame movable to and from: operati-ve position in timed relationV with said movable means.- s 1.1,.

45. Iii-a mining'apparatus,-a Wheel .su 'ported fra-mei movable: free'l; vover a trae way,'a mining machine mova le thereon, and

supplemental* supporting means automatically set in operative positionbefere the oent, passes over the `axis of the-front Wheels.' 4(3.' lIii";a'I1miningf" appara-tus, a wheeled truck fran'ie, and alat'rallyl movable loading 'and' unloading -m'emberI-reciproeably carried tlieI-'ebylanddisposable .thereon in a plane below the tops of thei'wheelsithereof..

4,7; Innatminingapparatus, ra Wheeled truck frame, a horizontally swinging-`mae'hine loadingand unloading member carried thereby,-a.nd meanswhereby the lattermay be disposed-'thereon .1in a horizontal plane below Lthe "tops .'o'f the wheels thereof.

4S. In' a* mining. apparatus, a wheeled truek frame", and a tiltable and horizontally swinging machine loading and unloading member Carried thereby and" disposable thereon in a vplane below the'tops of the wheels thereof.

49. In a. mining apparatus, a Wheeled truck frame, and a tltable and horizontally swinging' 'maehinelo'ading and unloading member r'ee'iproeab'ly carried thereby and disposableth'ereon in a plane below the tops of the -Whelsthereo 50. In' a mining apparatus, a wheeled truck frame,' atiltable and horizontally swinging' 'machine loading and unloading member reciproeably carried thereby in a vplane below' thetops 'ofv the wheels, and

means for-reciprocating said member.

51. In a mini-ng apparatus, a' Wheeled truck frame, a tiltable and horizontally 1 swingable inining machine 'loading and unloadmif member disposable thereon 1n a plane below the tops of the wheels-thereof,

and means for driving the truck wheels' from' a mining machine on said t'iltable member.

52. In a mining apparatus, a wheeled guiding lframe, a support movable relative thereto guided thereby and disposed below the level of the tops of the wheels thereof, anda machine loading and unloading mem- `ber carried on'said support.

53. In a mining apparatus, a wheeled guiding frame, a support guided thereby and disposed below the level of the top of said wheels, and means for laterally swiveling said support when it .reaches a predetermined position on said frame.

54, In -'a mining apparatus, a wheeled -guiding frame, a support guided vthereby and disposed below. the level of the top of guiding frame, a machine receiving member guided .thereon and disposed below the level of thetopof .the wheels, -and means for-lat- `erally swivling.- said" receiving member when itreaches a' predetermined position on said-frame.v

56. In a- 'mining 'apparatus a wheeled machine receiving'and-rgu1ding frame, a=

swivel member. slidably` mounted thereon,

and a vertically-tiltableQmachine l,loading member movable with said-swivel member and disposed fin a plane: below thelevel of the top of the-wheels.:- 1

f 57. In a.miningrapparatus,a Wheeled inachinereceiving and guiding frame, a-swivel-A member slidably mounted thereon, a vertically -tiltable machine loading lmemberv movable with said swivel member, and feed memberfengagi'ng means on said frame and on the rear'end of: saidtilting member.

.58. In a mininggapparatus, a, wheeled machine receiving and guiding frame, a swivel member slidably f mounted thereon, a vertically' tiltable machine discharging member on said swivel member, and A'eed member engaging means on. said-frame and on one side ofthe rear-endof said tiltingr member.

59. In a mining apparatus, 'a wheeled machine receivinffand guiding frame, a swivel member-.slidaly Emounted thereon, a .tilting machine loading member movable-with said swivel member, and feed member engaging means on -said frame and on opposite sides of the rear end of=said tilting. member.

60. In afmining apparatus, a wheeled machine receivingand guiding frame, a swivel member slidably mounted thereon` a vertically tiltable machine loading member movable with said swivel 'memben and feed member engagingmeans .on the opposite ends of said frame-and 0n..the rear end of saidtilting member.- j

61. In a mining apparatus, a; guiding frame, wheels therefor, ithebottom of said guiding frame being disposed substantially in the plane of the. axis of the wheels` a laterallyv swiveling machine carrying member movable thereon, and a mining machine carried on said carrying n'ieinber with its bottom disposed beneath the top of said wheels.

62. In a mining apparatus, a guiding frame, wheels therefor, the bottom of said guiding frame being disposed substantially in the plane of the top of the wheel axles, a swivel mounted machine carrying member movable thereon, a mining machine carried thereon, and s uppleinental supporting means for said frame.

63. In 'a mining apparatus, a guiding frame, wheels therefor, the bottom ofsaid lguiding frame being disposed substantially in the plane of the top ofthe wheel axles, a swivel mounted machine carrying member movable thereon, av mining-machine carried thereon, and supplemental supporting means for'said frame operating in timed relation with the movement of said machine.

64. In a mining apparatus, a guiding frame, wheels therefor, the bottom of said iding frame being disposed substantially in the plane of the top of the wheel axles, a swivel mounted tiltable machine carrying member movable thereon, a miningr machine carried thereon, and supplemental supporting means for said frame operating in timed relation-'with the movement of said machine.

65.In a mining apparatus, a machine receiving frame, a truck therefor, truck driving mechanism on said `frame,' amachine on said framemovable into operative relation to saidtruck `driving mechanism, and supplemental supporting means beneath the front end of said frame automatically movable into operative and inoperative. position as said machine moves reversely relative -to said truck driving mechanism.

66. In a mining apparatus, a. wheel supported frame having a guiding surface disposed beneath the level of the top of thc wheels, a tilting machine support movable relative thereto, a mining machine slidablc in and with said support, supplemental supporting mechanism controlled by thc movement of said machine, means for swiveliiigsaid support when the latter reaches a predetermined position on said frame., and means .operatively connected to said inachine for moving said support longitudinally and angulailyA and moving said machine relative to said support.

67. Ina mining apparatus, a wheeled machine supporting frame having its front end extending beyond the front wheels thereof, a tiltable machine unloading and loading frame disposed at the front end thereof and movable to and from tilted position as a machine isv unloaded therefrom and loaded thereon, respectively, and supplemental supporting mechanism for the front end of said supporting frame automatically set in operative position'prior Vto the unloading movement. of said tilting frame and moved to inoperative position afterthe loading movement thereof.

68. In a mining apparat-us, a rigid'whee'led truck frame, a rigid machine receiving mem ber overlying the axes of saidfw'heels and having its machine supporting surface disposed in. a plane adjacent said axes, .said member being tiltably and horizontally swiveled on said frame. and truck Wheel driving mechanism, on l:said frame including a member rotatable by a. mining machine onv said receiving member. I

69, In a mining apparatus, a rigid wheeled truck frame, a rigid machine receiving member thereon tiltably and horizontally swiveled at points substantiallymidway between its ends'and on thelfr'ont ofI said frame, truck wheel driving .mechanism including a member rotatable byaminingl mchinemon said receiving member, and a feedmember abutment on the rear end'of said frame.

70. In a miningfapparatus, a rigid wheeled truckframe, a ri id machine receiving melmber` thereon til'ta Ily andhorizoint'ally swiveled at points substantially midway between its ends and onmthe front' of ysaid frame, truck wheel driving mechanism yincluding a membery rotatable by' a mining machine on said receiving member, and` feedl member abutments on ,thejrear l ends of 'saidframe and receiving member. l l

71. In a mining apparatus, 'a Wheeled truck, and a machine receiving frame tiltably mounted thereon having an open -rear end anda longitudinally extending feed member receivingl notch in the latter. l

72. Ina mining apparatus, a wheeled truck` and a mining machine receiving frame tiltably mounted thereon,- having an open rear end and a pair of longitudinally` extending feed member receiving notches in the latter and on opposite sides of the center line thereof.

7 3. In a mining apparatus, a wheeled truck, a machine receiving frame tiltably mounted thereon having van open rear end and a longitudinally extending feed member receiving notch in the latter, and a feed member abutment carried on said truck in rear of said frame.

74. In a mining apparatus, a wheeled truck. a machine receiving frame tiltably mounted thereon having an open rear end and a pair of laterally spaced longitudinally extending feed member receiving notches in the latter on opposite sides of the center line thereof, and a feed member abutment carried on said truck in 4rear of said frame.

75. In a mining apparatus, a Wheeled truck` a machine receiving frame thereon swiveled on a vertical axis and tiltable about a transverse pivot, afeed member abutment on the rear end of said frame, and a feed swiveled on a vertical axis a-nd tiltable about a transverse pivot, said frame having an open rear end` and a. feed member notch therein, and a feed member abutment carried on the rear end 'of said truck.

1 1. In a' min-ing apparatus, a wheeled trn'c'l', a horizontally movable vertically tiltable machine'receiving frame thereon having .a .plurality of laterally spaced feed member abutments on its rear end, and a feed member abutment on the rear end of said truck.

78V. In combination, a wheeled truck, a vertically tiltable horizontally swinging frame thereon, truck driving mechanism on said truck including a member driven by a moving part of a mining machine on said frame, and lself-'contained means supported b'y said truck for utilizing 'the power of a mining machine when said frame is in a -laters'il position to move the machine onto said frame and into operative relation to Asaid member.

In a mining apparatus, a Wheeled truck, a horizontally swinging vertically tiltable machine receiving frame thereon, and means for utilizing the power of a mining machine when sai'd fra-me is in a lateral vposition to tilt and lswing said frame into Yalinement with said truck during movement ofsaid machine relative to said frame.

80. In a mining `ap paratus, a wheeled truck, a rhorizontally swingable vertically tiltable machine receiving frame thereon, and means for utilizing the power of a. mining machinewhen said frame is in a lateral position to tilt and swing said frame into alinement with said truck during movement of said machine relative to said frame and in one operation.

81. In a mining apparatus, a wheeled truck, a horizontally swingable vertically tiltable machine receiving frame thereon, and means whereby the flexible feeding member of a mining machine may be so connected to said frame and truck that the machine may be moved on to said frame and said frame tilted and swung into alinement with the truck in one continuous operation.

82. In a mining apparat-us, a wheeled truck, a horizontally swingable vertically tiltable machine receiving frame thereon, and means whereby the flexible feeding member of a mining machine may be successively connected to said frame and truck to load the machine on the former and tilt the former and to swing said frame into alinement with the truck.

83. In a mining apparatus, a wheeled truck, a tiltable and horizontally movable machine receiving frame thereon, truck driving mechanism on said truck including IUT.

a member meshing with a .rotating part of a mining machine on said receiving frame, and power means for tilting -said .frame and swinging the same and a fmining machine thereon 4from angular relation into operative relationwith said driving mechanisnrin one operation. i

84. In a mining alipalra-tus, a. Wheeled truck, a horizontally v svvingable vertically tiltable machine receiving frame .thereon having an open 'front end, a mining machine having a flexible feeding., memberl and supported directly. on said receivin'gframe and movable into and o' ut ofthe end thereof, and connections whereby. when 1 said. maichine is on the minebottom andsaid frame, is, laterally disposed the power'iofth'e machine may be utilizedto .drawisa'id machine'on .to said frame, tilt the latter, andiving the same vinto alinement. with said truck.V

. 85,.In a' mining apparatills',`fa wheeled truck, a phorizontallyvvingable. vertically tiltable machine; receiving lframe| thereon having an` open front end, a mining machine having va lflexible feeding'member and supported directly onsa'id receiving ,frame-land movable into .and out of the; end thereof, loading and `unloading jabutments for` said flexible member, and'trulckhdriving connections comprising intermeshing elements carried on said machine andon' said truck at .the rear end of said frame.

86, In a minin'gfapparatuma AWheeled truck, a horizontally svvingable vertically tiltable machine receiving-frame' thereon having an open front end, a mining machine having a flexible feeding member and supported directly on said receiving frame and movable into and outh'of the 'end thereof, loading and unloading abutments for said flexible member -comprising abutments on the rear end of vsaid truck and the opposite ends of, saidframe, and truck Wheel driving `mechanism on said truck adapted to be operatively connected to said mining machine.

87. In a mining apparatus, a Wheeled truck, a horizontally swingable vertically t-iltable machine receiving frame thereon having an open front end, a mining machine having a flexible feeding member and supported directly on vsaid receiving frame and movable into and out of the end thereof, loadingand unloading abutments for said flexiblemember comprising an abutment on the rear end o f said truck and a plurality of laterally spaced abutments on each end of1 said lframe, and truck wheel driving 'mechanism on saidtruck adapted tobe op eratively connectedto said mining machine.

88. In a mining apparatus, a wheeled truck, ahorizontally swingable vertically ,tiltable machine receiving frame thereon having anopen front end, a mining machine having a flexible feeding member and supported directly 4onsaid receiving frame and movable intov and outlof the 'end thereof, lloading and unloading'abutments for said flexible member comprising an abutment on the rear endof said truck and a plurality of laterally spaced abutments on each end of said frame, and truck Wheel driving mechanism including intermeshing elements carried' on the rear end of said machine and therearend of said truck.

' 89. In a mining apparatus, a wheeled 1truck, a. vertically .tiltable machine receiving frame thereon, upstanding feed member abutments on the rear end thereof on opposite sides of the longitudinal center line thereof, and a feed member. abutment carried on the rear end of said truck.

In testimony whereof I affix my signature.

" MORRIS P. HOLMES.

Certificate of Correction.

Patent No. 1,641,430. Granted September 6, 1927, to MORRIS P. HOLNIES.

It is hereby certified that, error appears in the printed specification of the aboveL numbered patent requiring oorxeetion :is follows: Page 1, line B2 and page 4, line 1?, for the WO1-d filler read pllm; page 7, line G9, Claim S for cooperative read cooperating; page 11, line 75, for the ordinal 11 read 77'; and that the said Letters PtentY should be read with these corrections therein that the same may conform t0 the reoord of the case in the Patent Oflf-e.

Signed and sealed this 18th day of October, A. D. 1927.

[SEAL] M. J. MUORE,

Aci'ng mmmlssimwr of Patens. 

